JAVA第十二周作业0521

 

package com.homework12;

public class Point {
    int x;
    int y;
    public Point() {
        
    }
    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }
    public void movePoint(int dx, int dy){
        x += dx;
        y += dy;
    }
    public void show(){
        System.out.print("X = " + x);
        System.out.println("\tY = " + y);
    }
    
}

package com.homework12;

public class P1 {
    public static void main(String[] args) {
        Point p1 = new Point();
        Point p2 = new Point(2, 3);
        p1.x = 1;
        p1.y = 2;
        p1.show();
        p2.show();
        System.out.println("-----移动后-----");
        p1.movePoint(4, 5);
        p2.movePoint(0, 2);
        p1.show();
        p2.show();
    }
    
    
}

 

 

 

package com.homework12;

public class Rectangle {
    int length;
    int width;
    
    public double getArea(){    //面积
        return length * width;
    }
    public double getPer(){        //周长
        return 2*(length + width);
    }
    public void showAll(){        //全输出
        System.out.println("length = " + length);
        System.out.println("width = " + width);
        System.out.println("area = " + getArea());
        System.out.println("per = " + getPer());
    } 
    
    public Rectangle(int length, int width) {
        this.length = length;
        this.width = width;
    }
    
}

package com.homework12;

public class p2 {
    public static void main(String[] args) {
        Rectangle p = new Rectangle(5, 3);
        p.showAll();
    }
}

 

 

 

 

 

package com.homework12;

public class laptop {
    
    public laptop() {
    
    }
    
    public laptop(char clour, int cpu) {
        this.clour = clour;
        this.cpu = cpu;
    }

    char clour;
    int cpu;
    
    public void show(){
        System.out.println("clour = " + clour);
        System.out.println("cpu = " + cpu);
    }
}

package com.homework12;

public class Test {
    public static void main(String[] args) {
        laptop p1 = new laptop();
        p1.clour = '白';
        p1.cpu = 10002;
        laptop p2 = new laptop('黑', 10003);
        p1.show();
        p2.show();
        
    }
}